Hi Lori
Not sure about that moss but I used some tropical moss found at most florist shops, also called Christmas Tree Moss, and it was fine but I didn't have any luck keeping it alive for long periods.

I'm more a fan of larger leaf liter such as Sea Grape or Magnolia leaves since they are large and not easily swallowed by a WTF. They also keep the dirt/substrate off the frogs.

If your going more for moss type bottom, I would just make sure its not something easily swallowed like sphagnum moss is and you have ample daytime lighting to help it along.